diff options
| author | Joerg Roedel <joro@8bytes.org> | 2013-03-26 22:48:23 +0100 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2013-04-10 03:20:04 +0100 |
| commit | e8dc286d726ea2238178837ba3572c1bfe462b2d (patch) | |
| tree | 7b729406af602d43e56b58579dfaf0bb39f095ed /drivers/iommu | |
| parent | c39ea1c36ac173cd07643f91e19671de3fe377e2 (diff) | |
| download | kernel_samsung_smdk4412-e8dc286d726ea2238178837ba3572c1bfe462b2d.zip kernel_samsung_smdk4412-e8dc286d726ea2238178837ba3572c1bfe462b2d.tar.gz kernel_samsung_smdk4412-e8dc286d726ea2238178837ba3572c1bfe462b2d.tar.bz2 | |
iommu/amd: Make sure dma_ops are set for hotplug devices
commit c2a2876e863356b092967ea62bebdb4dd663af80 upstream.
There is a bug introduced with commit 27c2127 that causes
devices which are hot unplugged and then hot-replugged to
not have per-device dma_ops set. This causes these devices
to not function correctly. Fixed with this patch.
Reported-by: Andreas Degert <andreas.degert@googlemail.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/amd_iommu.c | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index 0f074e0..07cb1a6 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -1874,16 +1874,16 @@ static int device_change_notifier(struct notifier_block *nb, /* allocate a protection domain if a device is added */ dma_domain = find_protection_domain(devid); - if (dma_domain) - goto out; - dma_domain = dma_ops_domain_alloc(); - if (!dma_domain) - goto out; - dma_domain->target_dev = devid; - - spin_lock_irqsave(&iommu_pd_list_lock, flags); - list_add_tail(&dma_domain->list, &iommu_pd_list); - spin_unlock_irqrestore(&iommu_pd_list_lock, flags); + if (!dma_domain) { + dma_domain = dma_ops_domain_alloc(); + if (!dma_domain) + goto out; + dma_domain->target_dev = devid; + + spin_lock_irqsave(&iommu_pd_list_lock, flags); + list_add_tail(&dma_domain->list, &iommu_pd_list); + spin_unlock_irqrestore(&iommu_pd_list_lock, flags); + } dev->archdata.dma_ops = &amd_iommu_dma_ops; |